Horseshoe-calk



UNITED STATES \VILLIAM PEARCE, OF PLANTSVILLE, ASSIGNCR OF PATENT OFFICE.

THREE-FOURTHS TO MERRIT N. WOODRUFF, NORMAN A. BARNES, AND JAMES H. PRATT, CF SOUTHINGTON, CONNECTICUT.

HORSESHOE-CALK.

SPECIFICATION forming part Of Letters Patent No. 470,702, dated March 15, 1892.

Application filed April 17, 1891- Serial No. 389,317. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM PEARCE, of Plantsville, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Horseshoe- Calks, of which the following is a full, clear, and exact description, whereby any one skilled in the art can make and use the same.

The object of my invention is to provide a calk such as is adapted for use on a horseshoe or like article for the purpose of preventing the horse from slipping and to enable it to secure a firmer hold, the calk being so constructed and arranged as to be readily removable and renewable in a short space of time, and be readily accessible for this purpose.

To this end my invention consists in the details of the several parts, making up the calk and its holding means, and in the combination of the same, as more particularly hereinafter described, and pointed out in the claims. 7

Referring to the drawings, Figure 1 is a detail bottom view of a horseshoe embodying my invention. Fig. 2 is a detail View of one form of wrench adapted for use in connection with the invention. Fig. 3 isadetail side view of the calk on enlarged scale. Fig. 4 is a detail view on enlarged scale in central vertical section through the shoe and calk.

In the accompanying drawings, the letter a denotes a horseshoe that may be of any ordinary form and make, with the, usual nailcreases b, and provided with any ordinary means for attaching to the hoof, as by nails driven through the nail-holes c. The shoeis provided at the toe a orheels a or at either of the places with calk-sockets for the reception of the calks d. These calks are removably secured in place in the shoe by means of interengaging threaded parts, so far as the calk-clamp d is concerned. A threaded socket e is provided at that part of the shoe where the calk is to be secured, and into this is fitted the threaded shank d of the clamp. This shank and the socket are tapered, the clamp having a slot lengthwise through the side so as to enable the clamp that is tubular to be changed as to its internal diameter. If desired, the clamp may be formed in two sepaarated; but it is preferable to make the clamp in the form of a tubular sleeve slitted along one side and thus making provision for the compression of the body part of the clamp. A further feature of the clamp is the renewrate parts, the edges of which are slightly sepable plug f, that forms the immediate holding wearing-face of the calk as a whole. This plug is preferably cylindrical in cross-section, of a diameter adapting it to fit snugly within the socket in the calk-clamp, and of a sufficient length to rest upon the bottom of the socket e in the shoe and project beyond the outer surface of the clamp a sufficient distance to serve the purposes of a calk. The hole forming the socket 6 preferably extends completely through the body part of the shoe, the portion 6 extending beyond the socket being preferably of less diameter than the threaded part of the socket.

It is not essential that the opening through the calk-clamp shall be cylindrical, as it may be of any shape; but this form is preferred as being cheaper and more convenient, it being only necessary that for the best performance of the intended function that the plug and the plug-socket in the clamp should conform in outline in cross-section.

In the use ofthis device it is intended that the clamp shall form a permanent part that is to be permanently attached to the shoe, and that the cavity within the clamp shallbe filled with a plug thatmay extend flush to the outer surface to form a mud-calk, as it is called, or the end of the plug may be squared oh? and project a slight distance beyond the surface of the clamp, forming a somewhat sharp calk, and a still sharper calk may be formed by bringing to any desired shape and to any degree of sharpness,.making it conical, wedge'shaped, or otherwise pointed. When the plug is made in the shape illustrated in the drawings, it may be readily removed and inserted with either the plain end or the sharpened end projecting beyond the face of the clamp. This plug is made, preferably, of hardened steel, and is the only part of the structure on which much wear comes in use. It is comparatively inexpensive, easily renewed, and

the outer end of the plug may be supplied in any desired number with the clamp devices that serve to secure it to the shoe.

When the plug having the conical end is reversed in the clamp, the point lies in the smaller part 6' of the socket and is not dulled by contact with any solid substance from any blow that is struck against the outer end.

In order to effect the proper holding action of the clamp upon the plug, the threaded socket is tapered and the shank of the clamp is also tapered, so that by turning the clamp,

as by means of the wrench g, (shown in Fig. 2 of the drawings,) the plug may secured Within it or released from the hold.

I claim as my invention 1. In a horseshoe having a threaded clampsocket, a separable hollow clamp having a threaded stem fitting said socket, a removable plug fitting within the hollow clamp, and a hole of less diameter than the plug extending from the bottom of the clampfsocket toward the outer surface of the shoe, all substantially as described.

2. In ahorseshoe having a tapered threaded socket, a separable clamp with a thread ed portion fitting said socket and having an opening lengthwise through the clamp, the plug fitting the opening in the clamp, and the hole socket through the shoe, all substantially as described. I

4:. In combination with ahorseshoe having a tapered, threaded, and shouldered socket, the smaller portion of the socket extending completely through the shoe, a removable hollow clamplhaving a tapered threaded portion fitting the said socket and slotted along one side, and the removable plug fitting the hollow clamp, all substantially as described.

. WILLIAM PEARCE.

Witnesses:

MARCUS H. HoLooMB,

JOHN COATS. 

